var haloObj = function(){
    this.x = [];
    this.y = [];
    this.alive = [];
    this.r = [];
}
haloObj.prototype.num = 5;
haloObj.prototype.init = function(){
    for(var i = 0; i < this.num; i++){
        this.x[i] = 0;
        this.y[i] = 0;
        this.alive[i] = false;
        this.r[i] = 0;
    }
}
haloObj.prototype.draw = function(){
    ctx1.save();
	ctx1.lineWidth = 2;
	ctx1.shadowBlur = 10;
	ctx1.shadowColor = "rgba(203,91,0,1)";
	for(var i = 0; i <this.num;i++)
	{
		
		if(this.alive[i])
		{
			//draw
			this.r[i] +=deltaTime * 0.05;
			if(this.r[i] > 80)
			{
				this.alive[i] = false;
				break;
			}
			var alpha = 1 - this.r[i] / 80;
			ctx1.beginPath();
			ctx1.arc(this.x[i], this.y[i], this.r[i], 0, Math.PI * 2);
			ctx1.closePath();
			ctx1.strokeStyle = "rgba(203,91,0," + alpha +")";
			ctx1.stroke();
		}
	}
	ctx1.restore();
}
haloObj.prototype.born = function(x, y){
    for(var i = 0; i < this.num; i++){
        if(!this.alive[i])
        {
            this.x[i] = x;
            this.y[i] = y;
            this.alive[i] = true;
            this.r[i] = 10;
        }
        
    }
}